The Oklahoma Mesonet’s quality-assurance (QA) consists of four principal components:
1) laboratory calibration,
2) on-site intercomparison,
3) automated QA, and
4) manual QA.
In the instrument laboratory, all sensors are calibrated to validate or improve upon factory calibrations.
On an annual basis, the accuracy of several types of sensors in the field is verified through comparison to calibrated reference sensors housed in a portable system.
To make a first pass through the 640,000+ observations that are received at the Mesonet each day, automated QA software includes numerous algorithms to evaluate the data received from remote stations.
Finally, the Mesonet’s QA meteorologists employ numerous manual techniques to complement automated QA including analysis of monthly statistics to detect sensor drift or bias (click on a month and year to the left to download a PDF version of a Monthly Report). In addition to detecting problematic sensors, the QA meteorologists trace the true start time of each problem so that appropriate data can be manually flagged as erroneous. The QA meteorologists are responsible for communicating problems to, and coordinating with, appropriate field technicians to ensure proper resolution (see a list of the current outstanding tickets below).
Current Trouble Tickets in the Oklahoma Mesonet
(For questions regarding these tickets, contact )
|Station||Variable||Date Reported||Problem Description|
|MEDI||Barometric Pressure at 0.75 m||2019-02-19 20:27:45||PRES reports constant value. Raw barometer reading on logger is -99999. Please rewire all connections.|
|FORA||Wind Speed at 2 m||2019-02-18 15:24:05||2m wind reports 0 when 10m wind is 4m/s. Suspect starting threshold problem. Replace sensor.|
|WEAT||Air Temperature at 1.5 m||2019-02-12 14:21:42||1.5m air temperature sometimes reports -7999 for a few observations in the afternoon. Replace sensor, unwire/rewire all connections (logger and sensor side), and check cable for damage.|
|BUFF||Wind Speed at 2 m||2019-02-04 19:32:19||2m wind speed 0 when 10m wind up to 3m/s regardless of wind direction. Replace sensor.|
|SALL||Soil Temperature at 5 cm under Native Vegetation||2019-01-25 22:30:45||5-cm sod suspected of being too shallow. Please rebury sensor in a new 5 cm plot.|
|BIXB||229L Delta Temperature at 5 cm||2019-01-08 20:33:12||5 cm sod reports out-of-range values for starting, final, and averaged soil temperature.|